Chalk-sharpener



(No Model.)

0. M. CLINTON.

GHALK SHARPENBR.

No. 577,548. Patented Feb. 23,- 1897.

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CHARLES M. CLINTON, OF ITHACA, NEW YORK.

CHALK-SHAFPENER.

SPECIFICATION forming part of Letters Patent No. 577,548, dated February23, 1897.

Application filed December 81, 1896. Serial No. 617,629. (No model.)

ener comprising a suitable body, a lid hinged thereon,.a longitudinalgroove upon the lid, a

mortise through it, a V-shaped knife mounted under said lid andextending into and more or less filling said mortise, the lower end ofsaid groove being closed by a transverse wall, and a hole through saidlid being provided at the foot of said wall. A suitable rack for holdingpieces of chalk is also provided at one end of said body. It isconstructed as follows, reference being had to the accompanyingdrawings, in which- Figure 1 is a side elevation of the device. Fig. 2is a top plan thereof. Fig. 3 is .a longitudinal section on line m m.Fig. 4 is a transverse section on line y y. perspective of the knifedetached.

A is a suitable body comprising a bottom 2, side walls 3, ends at, andan intermediate crosswall 5. A cover 6 is suitably hinged to said bodyin such manner asto close the opening or top of the box between the wall5 and one end. Other cross-walls 7 create a series of pockets to receiveand hold pieces of chalk. A longitudinal groove 8, substantially V-shaped in cross-section, is created upon the top of said cover in anysuitable manner, as by securing parallel strips thereon, the lower endbeing closed by a wall 9, at the foot of which is a hole 10 through saidcover. At a suitable point a mortise 11 is cut through said cover, beingalso partly in the walls of said groove, and 12 is a knife or cutterhaving laterals 13, creating an arrow-head, said laterals incliningupward and laterally and substantially parallel with the walls of saidgroove,

Fig. 5 is a beyond which they slightly project, presenting inclinedcutting edges. Thus when a piece of chalk is placed in the top of saidgroove and drawn down the point of the knife first begins to cut,cutting off the sides to create a V edge thereon, and then the edges ofthe laterals cut higher and higher up onto the sides. Also the point ofthe knife cuts out first at the upper end of the chalk, the outer endsof the laterals cutting out last, whereby all slivering or breaking offof particles is prevented. All of the cuttings fall into the box.

The wall 9 stops the chalk and prevents any dust from getting out ontothe table or cloth, all of it passing through the hole 10 into the box.

The inclination of the trough operates to prevent the device fromsliding around upon the table or cloth when in use.

Having described my invention, what I claim, and desire to secure byLetters Patent, 1s-- 1'. A challcsharpener comprising a box, an inclinedcover therefor, a groove in or upon said cover, a mortise through saidcover and partly in the walls of said groove, and an arrow-headedcutter, the cutting edges of which project through said mortise andbeyond the walls of said groove.

2. A chalk-sharpener comprising a box, an inclined cover therefor,parallel bars secured thereon creating a V-shaped groove between them, astop-wall at the bottom of said groove a hole through said cover at thefoot of said wall, a mortise through said cover and the walls of saidgroove, an arrow-headed cutter extending through said mortise andpresenting cutting edges within the walls of said groove.

In witness whereof I have hereunto set my hand this 23d day of December,1896.

CHARLES M. CLINTON.

In presence of' O. W. SMITH, HOWARD P. DENISON.

